Knight Field Enabled Nuclear Spin Polarization in Single Quantum Dots

Abstract

We demonstrate dynamical nuclear spin polarization in the absence of an external magnetic field, by resonant circularly polarized optical excitation of a single electron or hole charged quantum dot. Optical pumping of the electron spin induces an effective inhomogeneous magnetic (Knight) field that determines the direction along which nuclear spins could polarize and enables nuclear-spin cooling by suppressing depolarization induced by nuclear dipole-dipole interactions. Our observations suggest a new mechanism for spin-polarization where spin exchange with an electron reservoir plays a crucial role. These experiments constitute a first step towards quantum measurement of the Overhauser field.

5 pages, 3 figures

References in corpus (13)

• Electron spin decoherence in quantum dots due to interaction with nuclei
• Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field
• Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Optical pumping of electronic and nuclear spin in single charge-tunable quantum dots
• Long-lived memory for mesoscopic quantum bits
• Nuclear spin induced oscillatory current in spin-blocked quantum dots
• Optical pumping of quantum dot nuclear spins
• Enhancement of electron spin coherence by optical preparation of nuclear spins
• Polarized fine structure in the excitation spectrum of a negatively charged quantum dot
• Controlling a mesoscopic spin environment by quantum bit manipulation
• Spin-selective optical absorption of singly charged excitons in a quantum dot
• Selective Dynamic Nuclear Spin Polarization in Spin-Blocked Double-Dot

Cited by in corpus (99)

• Semiconductor Spintronics
• Room temperature coherent control of coupled single spins in solid
• Nuclear spin physics in quantum dots: an optical investigation
• Non-Markovian quantum jumps
• On measures of non-Markovianity: divisibility vs. backflow of information
• Confluence of resonant laser excitation and bi-directional quantum dot nuclear spin polarization
• Ultra-long distance interaction between spin qubits
• Nuclear Spin Switch in Semiconductor Quantum Dots
• Nuclear Spins in Nanostructures
• Open system dynamics with non-Markovian quantum jumps
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
• Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling
• Dynamic nuclear polarization of a single charge-tunable InAs/GaAs quantum dot
• Quantum computing by optical control of electron spins
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Nonlinear dynamics of quantum dot nuclear spins
• Nonequilibrium thermal entanglement
• Quantum measurement of a mesoscopic spin ensemble
• Dynamic nuclear spin polarization in resonant laser spectroscopy of a quantum dot
• Demagnetization of Quantum Dot Nuclear Spins: Breakdown of the Nuclear Spin Temperature Approach
• Stabilizing effect of nuclear quadrupole interaction on the polarization of electron-nuclear spin system in a quantum dot
• Environmental correlations and Markovian to non-Markovian transitions in collisional models
• Phenomenological memory-kernel master equations and time-dependent Markovian processes
• Quenching of dynamic nuclear polarization by spin-orbit coupling in GaAs quantum dots
• Quadrupolar induced suppression of nuclear spin bath fluctuations in self-assembled quantum dots
• Proposed method for direct measurement of non-Markovian character of the qubits coupled to bosonic reservoirs
• Measurement of the spin temperature of optically cooled nuclei and GaAs hyperfine constants in GaAs/AlGaAs quantum dots
• Quantum Description of Nuclear Spin Cooling in a Quantum Dot
• Quadrupolar spectra of nuclear spins in strained InGaAs quantum dots
• All-Optical Manipulation of Electron Spins in Carbon-Nanotube Quantum Dots
• Efficient dynamical nuclear polarization in quantum dots: Temperature dependence
• Stochastic jump processes for non-Markovian quantum dynamics
• Markovianity criteria for quantum evolution
• Spin-spin coupling in electrostatically coupled quantum dots
• Qubit protection in nuclear-spin quantum dot memories
• Dynamic Nuclear Polarization in Double Quantum Dots
• Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Nuclear Tuning and Detuning of the Electron Spin Resonance in a Quantum Dot
• Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot
• Controlling the polarization eigenstate of a quantum dot exciton with light
• Optically monitored nuclear spin dynamics in individual GaAs quantum dots grown by droplet epitaxy
• Perceptrons with Hebbian learning based on wave ensembles in plastic potentials
• Integrability and dark states in an anisotropic central spin model
• Theoretical study of nuclear spin polarization and depolarization in self-assembled quantum dots
• Electrical initialization of electron and nuclear spins in a single quantum dot at zero magnetic field
• Nonequilibrium nuclear-electron spin dynamics in semiconductor quantum dots
• Overhauser effect in individual InP/GaInP dots
• Polarization freezing of 10000 optically-cooled nuclear spins by coupling to a single electron
• General theory of feedback control of a nuclear spin ensemble in quantum dots
• Dynamics of a mesoscopic nuclear spin ensemble interacting with an optically driven electron spin
• Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe
• Singularity of dynamical maps
• Long nuclear spin decay times controlled by optical pumping in individual quantum dots
• Shortcuts to Dynamic Polarization
• Hyperfine interaction in InAs/GaAs self-assembled quantum dots : dynamical nuclear polarization versus spin relaxation
• Effective Quantum Dynamics of Interacting Systems with Inhomogeneous Coupling
• Electron and nuclear spin properties of the nanohole-filled GaAs/AlGaAs quantum dots
• Fine structure and optical pumping of spins in individual semiconductor quantum dots
• Comparison of non-Markovianity criteria in a qubit system under random external fields
• Nuclear magnetic resonance inverse spectra of InGaAs quantum dots: Atomistic level structural information
• Electron-nuclei spin dynamics in II-VI semiconductor quantum dots
• Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under non-resonant ultra-low power optical excitation
• Persistent dark states in anisotropic central spin models
• Optically tunable nuclear magnetic resonance in a single quantum dot
• Precise measurements of electron and hole g-factors of single quantum dots by using nuclear field
• Determining the validity of cumulant expansions for central spin models
• The decoherence dynamics of the multipartite entanglement in non-Markovian environment
• The Knight field and the local nuclear dipole-dipole field in an (In,Ga)As quantum dot ensemble
• Preparation of Non-equilibrium Nuclear Spin States in Double Quantum Dots
• Reconstruction of nuclear quadrupole interaction in (In,Ga)As/GaAs quantum dots observed by transmission electron microscopy
• Observation of Non-Markovianity at Room Temperature by Prolonging Entanglement in Solids
• Nuclear spin diffusion in the central spin system of a GaAs/AlGaAs quantum dot
• Direct measurement of hyperfine shifts and radiofrequency manipulation of the nuclear spins in individual CdTe/ZnTe quantum dots
• Alignment of nuclear spins in single quantum dots using unpolarized light
• Semiconductor nanostructures engineering: Pyramidal quantum dots
• Integrability and quench dynamics in the spin-1 central spin XX model
• Bistability of optically-induced nuclear spin orientation in quantum dots
• Signature of the Overhauser field on the coherent spin dynamics of donor-bound electron in a single CdTe quantum well
• Temperature-dependent dynamical nuclear polarization bistabilities in double quantum dots in the spin-blockade regime
• Protocol for generating multi-photon entangled states from quantum dots in the presence of nuclear spin fluctuations
• Enhancement of non-equilibrium thermal quantum discord and entanglement of a three-spin XX chain by multi-spin interaction and external magnetic field
• Spin-orbit coupled particle in a spin bath
• Nuclear spin polarization in a single quantum dot pumped by two laser beams
• Jump probabilities in the non-Markovian quantum jump method
• A solvable quantum model of dynamic nuclear polarization in quantum dots
• Voltage controlled nuclear polarization switching in a single InGaAs quantum dot
• Electron spin-flip correlations due to nuclear dynamics in driven GaAs double dots
• Pattern formation in reaction-diffusion systems in the presence of short-term memory
• Optically erasing disorder in semiconductor microcavities with dynamic nuclear polarization
• Spin dynamics of quadrupole nuclei in InGaAs quantum dots
• Kinetic approach to the nuclear-spin polaron formation
• Optical-phonon mediated exciton energy relaxation with highly preserved spin states Optical-phonon mediated exciton energy relaxation with highly preserved spin states in a single quantum dot
• Controlling transfer of quantum correlations among bi-partitions of a composite quantum system by combining noisy environments
• Dynamics of impurity, local and non-local information for two non identical qubits
• P-shell carriers assisted dynamic nuclear spin polarization in single quantum dots at zero external magnetic field
• Electrically tunable dynamic nuclear spin polarization in GaAs quantum dots at zero magnetic field
• Measurements of a fast nuclear spin dynamics in a single InAs quantum dot with positively charged exciton
• Extending Qubit Coherence Time via Hybrid Dynamical Decoupling